Function TryUnzip

src/file.cpp:189–257

inline FileBaseInfo DetermineFileBase(const std::string& str) { return DetermineFileBase(str.c_str()); }

static FCEUFILE * TryUnzip(const std::string& path) {
	unzFile tz;
	if((tz=unzOpen(path.c_str())))  // If it's not a zip file, use regular file handlers.
		// Assuming file type by extension usually works,
		// but I don't like it. :)
	{
		if(unzGoToFirstFile(tz)==UNZ_OK)
		{
			for(;;)
			{
				char tempu[512];	// Longer filenames might be possible, but I don't
				// think people would name files that long in zip files...
				unzGetCurrentFileInfo(tz,0,tempu,512,0,0,0,0);
				tempu[511]=0;
				if(strlen(tempu)>=4)
				{
					char *za=tempu+strlen(tempu)-4;

					//if(!ext)
					{
						if(!strcasecmp(za,".nes") || !strcasecmp(za,".fds") ||
							!strcasecmp(za,".nsf") || !strcasecmp(za,".unf") ||
							!strcasecmp(za,".nez"))
							break;
					}
					//else if(!strcasecmp(za,ext))
					//	break;
				}
				if(strlen(tempu)>=5)
				{
					if(!strcasecmp(tempu+strlen(tempu)-5,".unif"))
						break;
				}
				if(unzGoToNextFile(tz)!=UNZ_OK)
				{
					if(unzGoToFirstFile(tz)!=UNZ_OK) goto zpfail;
					unzCloseCurrentFile(tz);
					unzClose(tz);
					return 0;
				}
			}
			if(unzOpenCurrentFile(tz)!=UNZ_OK)
				goto zpfail;
		}
		else
		{
zpfail:
			unzClose(tz);
			return 0;
		}

		unz_file_info ufo;
		unzGetCurrentFileInfo(tz,&ufo,0,0,0,0,0,0);

		int size = ufo.uncompressed_size;
		EMUFILE_MEMORY* ms = new EMUFILE_MEMORY(size);
		unzReadCurrentFile(tz,ms->buf(),ufo.uncompressed_size);
		unzCloseCurrentFile(tz);